docs: def rgb_percent_to_name(rgb_percent_triplet, spec=u'css3'):
      """
      Convert a 3-tuple of percentages, suitable for use in an ``rgb()``
      color triplet, to its corresponding normalized color name, if any
      such name exists.
  
      The optional keyword argument ``spec`` determines which
      specification's list of color names will be used; valid values are
      ``html4``, ``css2``, ``css21`` and ``css3``, and the default is
      ``css3``.
  
      If there is no matching name, ``ValueError`` is raised.
  
      """
      return rgb_to_name(
          rgb_percent_to_rgb(
              normalize_percent_triplet(
                  rgb_percent_triplet
              )
          ),
          spec=spec
      )